Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aipc..966..107p&link_type=abstract
RELATIVISTIC ASTROPHYSICS: 4th Italian-Sino Workshop. AIP Conference Proceedings, Volume 966, pp. 107-113 (2008).
Astronomy and Astrophysics
Astrophysics
Cosmology, Dark Matter, Galaxy Clusters, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies
Scientific paper
Large amount of sources of cosmic information is desirable for precision cosmology, bispectrum is an unique one among the many potential methods. To realize the idea, an accurate theoretical model for bispectrum is required at large scales. A scale transformation rule initially invent for mapping linear power spectrum to nonlinear regime is implanted to construct model for bispectrum. The bispectrum predicted by perturbation theory at tree-level can be rescaled to match simulations in weakly and intermediate nonlinear regimes, especially at high redshifts. The novel approach disclose a different viewing angle to understand gravitational evolution of large scale structure, in addition to a promising theory template for bispectrum
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